package cn.zjitc.quickstart.request;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 演示获取请求头数据
 * 1.获取请求头中的referer
 * 2.防盗链
 */
@WebServlet("/requestDemo4")
public class RequestDemo4Servlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //演示获取请求头数据:referer

        String referer = request.getHeader("referer");
        System.out.println(referer);//http://localhost/web_basic/login.html

        //防盗链
        if(referer != null ){
            if(referer.contains("/web_basic/")){
                //正常访问
               // System.out.println("播放电影....");
                response.setContentType("text/html;charset=utf-8");
                response.getWriter().write("播放电影....");
            }else{
                //盗链
                //System.out.println("想看电影吗？来优酷吧...");
                response.setContentType("text/html;charset=utf-8");
                response.getWriter().write("想看电影吗？来优酷吧...");
            }
        }

    }
}
